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| author | Gabe Black <gabeblack@google.com> | 2013-10-06 10:54:53 -0700 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-08-12 23:18:52 +0200 |
| commit | eb623ab2044f77648658f4b0763616f5e1bea57a (patch) | |
| tree | dedbd31f12fe912c899e7c736a3ff9eac0dc41c2 /src/soc/nvidia/tegra124/monotonic_timer.c | |
| parent | 59ebc6e919b22595a0047d63d70db915f41ae871 (diff) | |
| download | coreboot-eb623ab2044f77648658f4b0763616f5e1bea57a.tar.xz | |
tegra124: Implement the monotonic timer by reading the 1us timer register.
It turns out there's a register in tegra which automatically counts at 1us
increments. It's primarily intended for hardware to use (I think to drive
other timers) but we can read it ourselves since a 1us timer is exactly what
we need to support the monotonic timer API.
Change-Id: I68e947944acec7b460e61f42dbb325643a9739e8
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/172044
Reviewed-by: Ronald Minnich <rminnich@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 161a39c53404ea0125221bbd54e54996967d6855)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6620
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/soc/nvidia/tegra124/monotonic_timer.c')
| -rw-r--r-- | src/soc/nvidia/tegra124/monotonic_timer.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra124/monotonic_timer.c b/src/soc/nvidia/tegra124/monotonic_timer.c index 3423dde3f5..7967b83bef 100644 --- a/src/soc/nvidia/tegra124/monotonic_timer.c +++ b/src/soc/nvidia/tegra124/monotonic_timer.c @@ -17,8 +17,11 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include <arch/io.h> +#include <soc/addressmap.h> #include <timer.h> void timer_monotonic_get(struct mono_time *mt) { + mono_time_set_usecs(mt, read32((void *)TEGRA_TMRUS_BASE)); } |